Hams often use One Turn Loop (Figure 1)
in their homebrewing. Such Loop
may be used in a transmitting/receiving HF- VHF Magnetic Loop
Antenna (Figure 2),
in a simple VHF oscillator working on transmitting without antenna
in receiving VHF antenna for simple VHF receiver (Figure 4).
One Turn Loop
The knowledge of inductance of the One Turn
Loop allows to design these devices easy.
You can find the inductance of a round One Turn Loop from the
diagrams given in Figure 5.
When you know the inductance of the loop you may find parameters
of the resonator tank (loop plus capacitor).
Simple VHF oscillator
You may use the diagram given on Figure 5
for calculation of the Insulation RF Choke (Figure 6). The inductance of that
RF Choke approximately is a sum of the inductance of turns forming
the choke. Example: One Turn Loop has inductance 1 μHn. Coil formed by five such turns has inductance